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секс,Parsons Brinckerhoff, Inc (now WSP) engaged to conduct tests on the proposed concrete ties and complete direct fixation fastener assemblies to be used for the Chicago-St. Louis High Speed Rail Project. These tests were part of the upgrades and improvements to the rail line between Chicago and St. Louis to accommodate high-speed Amtrak trains. Tests were conducted in accordance with the Concrete Tie Manufacture QA/QC Documentation and American Railway Engineering and Maintenance of Way Association (AREMA) Chapter 30, Testing of Monoblock Ties.

secx xxx also provided Petrographic and air-void system analysis as part of the tie evaluation.,xxxyvideo

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